the same as typing t 1f0e0ec4 modify project:… due:… …. an empty box clears that field.
this is a demo. the data is invented, it is shared with everyone else looking, and it is wiped every night. don't put anything real in it. what is this?
$ tracker 1f0e0ec4-9f5e-458b-8419-64f13095c503 e